High severity · published Sep 3, 2026
CVE-2026-71404
Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole
8.7
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted.
This issue affects Rancher: before 2.15.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rancher · SUSE
before 2.15.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71404
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-71404
Issue Tracking
https://github.com/rancher/rancher/pull/56593
Issue Tracking
https://github.com/rancher/rancher/pull/56642
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